You Can Learn AI Agent System Design In 19 Min | RAG, Vector Database, Evals, Function Calling

Code Follow-up: https://youtu.be/ZREt9MAozho This is how I think through designing a full stack AI Agent System, with all key concepts you need -- Vector Database, Retrieval-Augmented Generation (RAG), Semantic Search & Policy Checks, Function Calling and more. The use case I picked is to manage e-Commerce customer support. You can learn it even if you don't come from a technical background.

You can build anything. You can learn anything. 💪
Launch Full-Stack App Template: https://github.com/ShenSeanChen/launch-mvp-stripe-nextjs-supabase
My AI Agent Startup AutoManus.io - an AI Sales Leads Manager for Businesses Selling Physical Products

☕️ Buy me a coffee: https://buy.stripe.com/5kA176bA895ggog4gh
- X: https://x.com/ShenSeanChen 
- Sean's Discord: https://discord.gg/tvECErKcFr
- AutoManus Discord: https://discord.gg/5HhcNjCR
- LinkedIn: https://linkedin.com/in/shen-sean-chen 
- Github Link: https://github.com/ShenSeanChen
- Instagram: https://www.instagram.com/sean_tech_stories

Sub Count when launched: 5615

Top Github Repos
- LaunchMVP NextJS,Supabase,Stripe (797 stars): https://github.com/ShenSeanChen/launch-mvp-stripe-nextjs-supabase
- ReactNextJSTips (45 stars): https://github.com/ShenSeanChen/yt-react-nextjs-tips
- SupabaseTipsKanban (22 stars): https://github.com/ShenSeanChen/yt-supabase-tips-kanban
- KimiK2Claude (21 stars): https://github.com/ShenSeanChen/yt-kimi-k2-claude
- AuthSupabaseGoogle: https://github.com/ShenSeanChen/yt-auth-supabase-google
- FastapiGCPPro: https://github.com/ShenSeanChen/yt-fastapi-gcp-pro
- SupabaseHero: https://github.com/ShenSeanChen/yt-supabase-hero
- LaunchAnApp: https://github.com/ShenSeanChen/yt-launch-an-app

You Can Build Anything Playlist (Full-Stack Dev Without CS Degrees)
- Core7: 95% React/NextJS Use Cases https://www.youtube.com/watch?v=vZzFlAjz4rA&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=16
- Core6: 95% Supabase Use Cases https://www.youtube.com/watch?v=Pnoq2tIif3s&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=15
- Core5: StripeNextJSSupabase https://www.youtube.com/watch?v=ad1BxZufer8&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=8
- Core4: AuthSupabaseGoogle https://www.youtube.com/watch?v=AZAU3ClAWWE&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=6
- Core3: FastapiGCPPro https://www.youtube.com/watch?v=u3sfqpzzo-U&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=5
- Core2: SupabaseHero https://www.youtube.com/watch?v=V0kmgkyPsVQ&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=4
- Core1: LaunchAnApp https://www.youtube.com/watch?v=iQ2izvGG4tQ&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=3
- Launch WhereToMeet w/ GoogleMaps, Calendar, Supabase, Cursor: https://www.youtube.com/watch?v=5xMjX1QxGUY&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR&index=2
- Launch EncourageMe w/ Cursor, Supabase, Vercel https://www.youtube.com/watch?v=hnvL4xa2DHA&list=PLE9hy4A7ZTmpGq7GHf5tgGFWh2277AeDR

Timeline
00:00 Intro
00:23 Problem to Solve Today
00:59 Goals
02:13 Rules of the Scope
03:39 Backend & Database
04:13 Vector Database VS Relational DB
04:38 What's a Vector Database
05:31 Sketch the AI Agent System Design
05:53 User Auth Gateway
06:32 CRUD with Relational DB
06:49 How Would AI Agents Interact with User Chats
07:08 Introducing Router Agent
07:38 Q&A AI Agent (The Brain/CEO)
08:36 When to Loop in Humans?
09:20 How the Router Agent Proceeds
09:33 Planner Agent
09:58 What is Functional Calling?
10:15 Tools & APIs
11:24 Should We Use AI Agents or Deterministic Workflows
12:28 Retrieval-Augmented Generation (RAG) + Vector Database
14:39 What Happens after RAG
15:45 The Q&A Agent 
17:02 AI Agent System Design Overview
17:10 Observability, Metrics, Evals
17:49 CRM Integration
18:29 Final Overview